Grill brush



FIG. 1 is a perspective view of a grill brush in accordance with the present design;

FIG. 2 is a front elevational view thereof,

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dot-dash broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are included for the purpose of illustrating portions of the grill brush; the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a grill brush, as shown and described. 